echo.ino

// libraries to be included


#include <AltSoftSerial.h>

AltSoftSerial altSerial;

void setup() {
  Serial.begin(9600); 
  while (!Serial);  
  Serial.println("AltSoftSerial wird getestet");
  
  altSerial.begin(9600);
  altSerial.println("Hello World");
}

void loop() {
  char textSenden;

  if (Serial.available()) {
    textSenden = Serial.read();
    altSerial.print(textSenden);
  }
  if (altSerial.available()) {
    textSenden = altSerial.read();
    Serial.print(textSenden);
  }
}